Siemens W1MM1400 Meter Stack Module 1 Phase Lever Bypass

Siemens W1MM1400 Meter Stack Module is a single‑phase, ringless lever‑bypass meter stack component intended for commercial installations. It supports 1 meter position per stack with incoming and outgoing connections and five‑jaw sockets for standard Siemens meter assemblies. The lever bypass design provides a temporary direct connection between line and load sides without removing the meter, a configuration documented for commercial ringless stacks. Rated for up to 400 A per tenant breaker in a 1‑phase, 3‑wire service, it suits mid‑size commercial applications. External dimensions for this family variant are approximately 44.00 inches in height, 16.31 inches in width, and 9.69 inches in depth, with mounting and clearance designed to integrate with Siemens meter‑stack assemblies. The W1MM1400 sits within Siemens’ lever‑bypass meter stack catalog, alongside related one‑phase, 400 A configurations such as WML11400RJ, illustrating consistent form factor and socket arrangement across 1‑phase lever‑bypass stacks.